<template>
  <div class="tabs">
    <el-tag
      v-for="(item,index) in tags"
      :key="item.label"
      :closable="item.name !== 'home'"
      :effect="$route.name === item.name ? 'dark' : 'plain'"
      @click='changeMenu(item)'
      @close='handleClose(item,index)'
      size="small"
    >
      {{ item.label }}
    </el-tag>
  </div>
</template>

<script>
import { mapState, mapMutations } from 'vuex'
export default {
  name: "commonTag",
  data() {
    return {};
  },
  computed:{
    ...mapState({
        tags:state => state.tab.tabsList
    })
  },
  methods:{
    ...mapMutations(['closeTag']), 
    //点击tag跳转的功能
    changeMenu(item){
        this.$router.push({ name: item.name})
    },
    //点击tag删除的功能
    handleClose(item,index){
        this.closeTag(item)
        const length = this.tags.length
        //删除后跳转逻辑
        if(item.name !== this.$route.name){
            return
        }
        //表示的是删除的最后一项
        if(index === length){
            this.$router.push({
                name:this.tags[index - 1].name
            })
        }else{
            this.$router.push({
                name:this.tags[index].name
            })
        }
        
    }
  }
};
</script>

<style lang='less' scoped>
.tabs{
    padding:20px;
    .el-tag{
        margin-right:15px;
        cursor:pointer;
    }
}
</style>
